In this study, an electrochemical analysis, coupled with the concept of back neutralization titration and the voltammetric determination of surplus acid, is proposed for determining the total alkalinity of water samples. When linear sweep voltammetry of 3,5-di-tert-butyl-1,2-benzoquinone (DBBQ) with H₂SO₄ in a water and ethanol (44 : 56, v/v) mixture was carried out using a bare glassy carbon working electrode, a cathodic prepeak of DBBQ caused by H₂SO₄ was observed on the voltammogram at a more positive potential than when compared with the original cathodic peak of DBBQ. When similar voltammetry was carried out in the presence of Na₂CO₃ and H₂SO₄, the cathodic prepeak height of DBBQ was decreased with an increase in the Na₂CO₃ concentration. The decrease of the cathodic prepeak height of DBBQ was found to be linearly related to the Na₂CO₃ concentration ranging from 0.025 to 2.5 mM (r² = 0.998). The total equivalent concentrations of inorganic bases in samples of mineral water and tap water were determined, and then the results were converted to the total alkalinities of the water samples (mg/L CaCO₃). The total alkalinities of the water samples determined by the present electrochemical analysis were essentially the same compared with those by the neutralization titration method. From these results, we were able to demonstrate that the present electrochemical analysis with accuracy and precision could be applied to determine the total alkalinity, which is one of the indicators to examine water quality. The present electrochemical analysis would contribute to achieving the sustainable development goals (SDGs) of #6 and #14.

在这项研究中，提出了电化学分析，结合反中和滴定的概念和剩余酸的伏安法测定，来测定水样的总碱度。_{当在水和乙醇（44：56，v/v）混合物中使用 H 2} SO ₄对3,5-二叔丁基-1,2-苯醌（DBBQ）进行线性扫描伏安法时，使用裸玻璃在碳工作电极上，在伏安图上观察到由H ₂ SO ₄引起的DBBQ的阴极预峰，其电位比DBBQ的原始阴极峰更高。_{当在Na 2} CO ₃和H ₂ SO ₄存在下进行类似的伏安法时，DBBQ的阴极预峰高度随着Na ₂ CO ₃浓度的增加而降低。_{发现DBBQ 阴极前峰高度的降低与Na 2} CO ₃浓度范围从0.025 到2.5 mM ( r ² = 0.998)呈线性相关 。测定矿泉水和自来水样品中无机碱的总当量浓度，然后将结果换算为水样的总碱度（mg/L CaCO ₃）。本电化学分析法测定的水样总碱度与中和滴定法测定的水样总碱度基本相同。从这些结果中，我们能够证明当前的电化学分析具有准确度和精密度，可以用于确定总碱度，这是检测水质的指标之一。目前的电化学分析将有助于实现#6 和#14 的可持续发展目标 (SDG)。